Ilya Nikolaevskiy 441dbf9a56 Revert "Add scaling interface to VideoFrameBuffer"
This reverts commit c79f1d8cfb48c348692320b05fa31598ed7067ca.

Reason for revert: Breaks downstream project.

Original change's description:
> Add scaling interface to VideoFrameBuffer
>
> This can be overriden for kNative frame types to perform scaling efficiently.
>
> Default implementations for existing buffer types require actual
> buffer implementation, thus this CL also merges "video_frame"
> with "video_frame_I420" build targets.
>
> Bug: webrtc:11976, chromium:1132299
> Change-Id: I3bf5f6bf179db5e7ab165b1c2301980043a08765
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/186303
> Commit-Queue: Ilya Nikolaevskiy <ilnik@webrtc.org>
> Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
> Reviewed-by: Stefan Holmer <stefan@webrtc.org>
> Reviewed-by: Sami Kalliomäki <sakal@webrtc.org>
> Reviewed-by: Niels Moller <nisse@webrtc.org>
> Reviewed-by: Evan Shrubsole <eshr@google.com>
> Cr-Commit-Position: refs/heads/master@{#32352}

TBR=mbonadei@webrtc.org,sakal@webrtc.org,ilnik@webrtc.org,nisse@webrtc.org,stefan@webrtc.org,eshr@google.com

Change-Id: I86ac697bf963ef7e2c4f2ed34c3a7bf04f4f1ce1
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: webrtc:11976
Bug: chromium:1132299
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/187344
Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org>
Commit-Queue: Ilya Nikolaevskiy <ilnik@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#32354}
2020-10-08 14:16:23 +00:00
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How to write code in the api/ directory

Mostly, just follow the regular style guide, but:

  • Note that api/ code is not exempt from the “.h and .cc files come in pairs” rule, so if you declare something in api/path/to/foo.h, it should be defined in api/path/to/foo.cc.
  • Headers in api/ should, if possible, not #include headers outside api/. Its not always possible to avoid this, but be aware that it adds to a small mountain of technical debt that were trying to shrink.
  • .cc files in api/, on the other hand, are free to #include headers outside api/.

That is, the preferred way for api/ code to access non-api/ code is to call it from a .cc file, so that users of our API headers wont transitively #include non-public headers.

For headers in api/ that need to refer to non-public types, forward declarations are often a lesser evil than including non-public header files. The usual rules still apply, though.

.cc files in api/ should preferably be kept reasonably small. If a substantial implementation is needed, consider putting it with our non-public code, and just call it from the api/ .cc file.